Evidence row 120098

Observed 26 Oct 2026, 14:40 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://saylorinnovations.com/api/kb/database-migration-rollback
Recorded: 26 Oct 2026, 14:40 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 74ea944a7524f153e043a48e60f75db0813dbbc7dabd4dd1f2fc972f7b369aac
Leaf: 0x541b5604202aecbe57263d4cac3c3a55042715c92f87d1b56626a3790f6372cd

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/database-migration-rollback"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:database-migration-rollba",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:database-migration-rollba",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:database-migration-rollba",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:database-migration-rollba",
          "reference": "CKcmM2u5uki9rnS2P6hEsxnUe5Dj9toThJMQcRRPXPMW",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhYmFzZS1taWdyYXRpb24tcm9sbGJhY2siLCJyZWZlcmVuY2UiOiJDS2NtTTJ1NXVraTlyblMyUDZoRXN4blVlNURqOXRvVGhKTVFjUlJQWFBNVyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTAyMDE2NzI0fQ.EGLOpqEOYp2eFqw7ieEB5CSwkRWw2MpCYNRr0InwqRQ"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:database-migration-rollba",
          "reference": "6vq6tdmCayzWjrSFtu1bemkRM8EN9EYuggpkjXHbduhM",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhYmFzZS1taWdyYXRpb24tcm9sbGJhY2siLCJyZWZlcmVuY2UiOiI2dnE2dGRtQ2F5eldqclNGdHUxYmVta1JNOEVOOUVZdWdncGtqWEhiZHVoTSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTAyMDE2NzI0fQ.8CJrL_TGAtbXy2T-N8BgCWRc1f1fCE53irRgbfM9wbE"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "93054",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:database-migration-rollba",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "95932",
          "reference": "J8GMWxNfy6VYai91AJGwrrZoXG2Dh6tG9h5nG3ovt1Dr",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhYmFzZS1taWdyYXRpb24tcm9sbGJhY2siLCJyZWZlcmVuY2UiOiJKOEdNV3hOZnk2VllhaTkxQUpHd3JyWm9YRzJEaDZ0RzloNW5HM292dDFEciIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MzA1NCwiZXhwIjoxNzkyNTAyMDE2NzI0fQ._EYi9aXdGS0Kk44DY0gHZWDQNiOqJHDuJhZwW0zB8Ts",
          "solUsdPrice": 104.24
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Database migration and rollback - compatibility, backups, bounded locks and staged cutover",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "A migration package with dependency inventory, forward/backward compatibility, backup and restore proof, bounded locks/backfill, data checks, staged cutover, and a tested recovery decision.",
              "c": "Self-Hosting & Infra",
              "id": "database-migration-rollback",
              "t": "Database Migration and Rollback"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-20T13:11:36.786Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-20T13:11:36.591Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/database-migration-rollback",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "database-migration",
      "rollback",
      "schema-change"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Database migration and rollback - compatibility, backups, bounded locks and staged cutover"
}

What the leaf hashes

{"body":"74ea944a7524f153e043a48e60f75db0813dbbc7dabd4dd1f2fc972f7b369aac","id":120098,"kind":"listing","method":"baseline/1","observed_us":1793025617233291,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/database-migration-rollback","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).
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Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON